I need an st4 expression to render an element if a string is not empty:
<if(theString)>...<endif>
does not work - it seems to only work for arrays.
I've tried if(theString.length > 0)
and all kinds of stuff, but it looks like it this only works for variables that are not set or for arrays.
I am iterating over a list and rendering this, so I could have values in the middle that are empty strings that I don't want to render anything at all for.
I've been struggling trying to find the ability to compare strings in a conditional. I want to be able to test for a condition like obj.Name == 'foobar'
. Not sure if stringtemplate-4 can do it?
To render if the value is not null you should be able to do the following.
$if(obj.Name)$ $obj.Name$ $endif$ // prints the Name property of obj
But to find the length of a string you can use strlen
function.
ie.
// obj.Name = "foobar", prints 'Length of Name is 6'
$if(strlen(obj.Name))$ Length of Name is $strlen(obj.Name)$ $endif$
Here is a helpful list of all the functions : https://github.com/antlr/stringtemplate4/blob/master/doc/cheatsheet.md
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.